[Lustre-discuss] very slow directory access (lstat taking >20s to return)

[Wang Yibin]

在 2010-11-9，下午10:35， Frederik Ferner 写道：

> 
> I assume on a busy OST this could still take a while, though?
> 

Of course the load on the OST will affect the directory stats. 
I suggest you tune the maximum statahead count if there usually are a lot of files in a normal directory:

# echo n > /proc/fs/lustre/llite/*/statahead_max

where n <= 8192.